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2.4G数字无绳电话

管理员:   发布时间:2014-10-09

 本2.4G数字无绳电话方案采用美国国家半导体公司的2.4G无线方案。本系统运行在2.4GHz(2400-2483.5GHz)开放频段上,采用时分双工(TDD),调制方式为BT=0.5的GFSK,调制指数为0.28~0.35。采用跳频方案以确保链路稳定。本方案包含1台母机和1台子机,但同时可带4台子机。4台子机可同时进行通讯。

基本 RF 指标

Item

Specification

Comment

Receive Sensitivity

Minimum: -89dBm

Typically: -92dBm to -94dBm

Maximum: -96dBm

@ BER = 0.001

Receive IIP3

-21dBm to -19dBm


Transmit Power (NTP)

Minimum: 20dBm

Typically: 22dBm to 24dBm

Maximum: 25dBm


Approx. 200mW

Signaling Bit-rate

576Kbit/sec


Modulation

GFSK

Bandwidth 20dB < 0 . 864MHz

Channels

95

Channel spacing: 0.864 MHz

RX/TX slots

4/4


Fast Frequency Hopping

Up to 800 hops/sec


Antenna Diversity

Control signals are available from the module

Antenna switch has to be added externally

Dual Slot Diversity


Antenna switch has to be added externally

Standard Compliance

FCC part 15.247/249


CVM: (1 st Generation)

  • The protocol and software interface is contained in the SC14428

  • Module for fixed part and portable part

  • Size is 45.6X26.6X 6mm